Lenovo 4XG7A63598 SR645 Epyc 75F3

Lenovo 4XG7A63598 AMD EPYC 75F3 32-Core Processor for ThinkSystem SR645

Overview

The Lenovo 4XG7A63598 is a factory-configured AMD EPYC 75F3 processor option for the Lenovo ThinkSystem SR645 2-socket rack server. Based on AMD's 7nm Zen 3 EPYC architecture, the 75F3 is a 32-core, 64-thread processor tuned for high per-core frequency performance — the defining characteristic that separates it from higher core-count EPYC variants in the same family. With a 2.95 GHz base clock and 4 GHz boost, this processor targets workloads where single-threaded throughput or per-core licensing costs are the binding constraint, not raw core count.

Deployed in the SR645 platform, this processor gives architects a direct path to 32 high-frequency cores per socket — or 64 cores in a 2-socket SR645 configuration — without the frequency penalties that come with AMD's 48-core and 64-core EPYC variants. The 280W TDP is a real planning number: factor it into your rack power and cooling calculations before deployment.

Key Features

• 32 Cores / 64 Threads at 2.95 GHz Base, 4 GHz Boost: The 75F3's high base clock means consistent throughput on per-core-licensed software (Oracle, SAP, Microsoft SQL Server) — you're not paying for idle headroom. The 4 GHz boost translates to responsive latency on OLTP, ERP, and analytics workloads where burst frequency matters.
• 256 MB L3 Cache: 8 MB of L3 per core is a substantial on-die working set. Database buffer pools, in-memory analytics, and video management server indexing tasks that thrash main memory on cache-starved processors will show measurable latency improvement here.
• Octa-Channel DDR4-3200 Memory, 204.8 GB/s Bandwidth: Eight memory channels at 3200 MHz deliver 204.8 GB/s of memory bandwidth — enough to keep all 32 cores fed on bandwidth-intensive workloads. This is the spec that matters for NVR/VMS deployments recording and analyzing large numbers of concurrent high-resolution streams.
• AMD 7nm Lithography: The 7nm process node means the 75F3 delivers its 32-core, 280W envelope more efficiently than prior-generation EPYC on 14nm. For always-on infrastructure (NVRs, storage servers, surveillance analytics appliances), lower leakage current at idle translates to measurable annual energy savings at scale.
• Socket SP3 (LGA-4094): The SR645 uses the same Socket SP3 used across AMD's EPYC 7003 series. If you're planning a processor upgrade path within the SR645 chassis, the socket is compatible across the Milan generation — no motherboard swap required when moving between supported 7003 SKUs.
• 64-bit Operating Modes, DDR4-SDRAM Support: Full 64-bit instruction set with DDR4-3200 support ensures compatibility with current hypervisor stacks (VMware vSphere, Microsoft Hyper-V, KVM), container runtimes, and enterprise OS environments without special configuration.
• No Cooler Included: The 4XG7A63598 ships as a processor kit only — the SR645 platform requires the appropriate Lenovo-validated heatsink separately. Verify heatsink compatibility against the ThinkSystem SR645 product guide before ordering, as standard and performance heatsink options differ for 280W TDP processors.

Integration and Compatibility

The 4XG7A63598 is validated for the Lenovo ThinkSystem SR645 server platform. The SR645 is a 2-socket 1U/2U AMD EPYC 7003-series rack server, and this processor option is sold as a Lenovo-qualified factory or field upgrade kit. Before deploying, confirm the server's UEFI/BIOS version supports the EPYC 7003 (Milan) generation — early SR645 units shipped with EPYC 7002 (Rome) and require a firmware update prior to installing Milan processors.

Memory configuration: octa-channel operation requires DIMMs populated symmetrically across all eight memory channels per socket. Asymmetric DIMM population will reduce effective bandwidth below the 204.8 GB/s ceiling — a relevant constraint if you're sizing the platform for high-throughput storage or video analytics. DDR4-3200 is the rated maximum; validate DIMM speed compatibility in the SR645 memory configuration guide for your specific DIMM count and rank configuration.

For server and storage platforms in surveillance and security operations centers, the EPYC 75F3's per-core frequency profile makes it a natural fit under enterprise NVR and VMS workloads where per-core software licensing is a factor. Architects evaluating the broader Lenovo server line should compare the 75F3 against higher-core-count EPYC variants in the SR645 rack server configuration guide — more cores at lower frequency is the right trade if your workload is throughput-bound rather than frequency-bound.

Frequently Asked Questions

Q: What server platform is the Lenovo 4XG7A63598 compatible with?

A: The 4XG7A63598 is a validated processor option for the Lenovo ThinkSystem SR645. It uses Socket SP3 (AMD EPYC 7003 series) and is not compatible with other Lenovo server platforms or non-SP3 motherboards.

Q: Does the 4XG7A63598 include a heatsink or cooler?

A: No. This processor kit does not include a cooler. The ThinkSystem SR645 requires a separately ordered Lenovo-validated heatsink. Given the 280W TDP, verify that the correct performance heatsink option is included in your SR645 build — standard heatsinks may not be rated for 280W processors.

Q: What is the base and boost clock speed of the AMD EPYC 75F3?

A: The AMD EPYC 75F3 operates at a 2.95 GHz base frequency with a boost clock up to 4 GHz. This high base-to-boost ratio distinguishes it from higher-core-count EPYC variants that trade per-core frequency for more cores.

Q: How much memory bandwidth does the EPYC 75F3 support?

A: The processor supports octa-channel DDR4-3200 memory, delivering up to 204.8 GB/s of memory bandwidth per socket. Full bandwidth requires symmetric DIMM population across all eight channels.

Q: Is the AMD EPYC 75F3 a 7nm processor?

A: Yes. The EPYC 75F3 is manufactured on a 7nm process node (AMD's Zen 3 / Milan architecture), which contributes to its power efficiency relative to prior EPYC generations built on 14nm.

Q: What is the TDP of the 4XG7A63598 processor?

A: The AMD EPYC 75F3 has a Thermal Design Power (TDP) of 280W. This is a critical input for rack power planning and heatsink selection — ensure your SR645 power supply configuration and rack PDU capacity account for this before deployment.

James Everett

I spec EPYC-based servers regularly for enterprise security operations and video analytics infrastructure, and the 4XG7A63598 fills a specific gap: you need the SR645 platform's memory bandwidth and I/O density, but your workload — whether it's a large VMS database, a per-core-licensed analytics engine, or a high-frequency compute cluster — puts a premium on clock speed over core count. At 2.95 GHz base and 4 GHz boost with 32 cores, the EPYC 75F3 is the highest-frequency option in the Milan lineup that still gives you meaningful parallelism.

Technical Highlights:

• 4 GHz Boost Clock: The highest boost frequency in the EPYC 7003 family at this core count — directly relevant when per-core software licensing makes running 48 or 64 cores prohibitively expensive, but you still need headroom for bursts.
• 256 MB L3 Cache: At 8 MB per core, the 75F3 carries more per-core cache than most competing x86 server processors at this TDP — meaningful for in-memory database, NVR index, and analytics buffer workloads that spill to DRAM on cache-starved hardware.
• 204.8 GB/s Memory Bandwidth: Octa-channel DDR4-3200 at full population keeps all 32 cores fed on bandwidth-intensive tasks — a ceiling that matters when the SR645 is handling parallel high-resolution video ingest alongside analytics processing.

Deployment Considerations:

• The 280W TDP is non-trivial in a 1U or 2U chassis — confirm your SR645 PSU configuration (750W vs. 1100W options) and your rack PDU circuit capacity before finalizing the order, especially in a 2-socket configuration where both sockets are populated.
• No cooler is included. The SR645 platform has both standard and high-performance heatsink options; at 280W TDP the performance heatsink is required — ordering the wrong heatsink SKU is a common field mistake that delays deployment.

This processor is the right call for SR645 deployments running per-core-licensed VMS software (Milestone, Genetec, Verkada Command Connector on-prem) or Oracle/SQL workloads in security operations centers where frequency and cache matter more than maximizing core count.